Rob is scheduled to fight in September, which ties in with the start of season 9.

The press release hints at a tourney run for Stapes, and Sass is said to be "featured prominently with Bellator over the coming months, including a possible tournament appearance in 2014". So we could potentially see both of those guys fighting in one-off bouts in the Summer Series. Stapes is still fighting on OMMAC according to Chris Zorba though.

With Bellator looking at potentially doing a couple of shows over here next year too, I can't see any of them being shelved.

Putting the pieces together, I'd assume that it would be Stapes and Sinclair going into a Season 9 LW tourney (Sass is being considered for a tourney in 2014). Keeps the Kaobon lads apart. Stapes vs Sass would have been interesting though, A) because of the Kaobon connection and B) because Sass handed Stapes his only pro loss.